I know EZY (Paul) has done really dark tint also Brad 08Hemi they have added layers as well ... the rear factory being 18% I would stick with 20% upfront to even it out and make it flow just my thought

I went with 5% over the factory (it’s dark) and 20% on the front windows going to get the windshield done with 35% in the near future, had 20% on my f150 all the way around including the windshield and it was pretty dark.